Uploaded February 2026 | Updated September 2026, 2 weeks ago
For two decades, the Pembrokeshire Murders were the ultimate cold case. John Cooper had brutally executed four people on the Welsh coast, leaving the community in terror and the police with a trail that went dead in 1989. Cooper was a ghost—until he walked into a television studio.
This documentary investigates the incredible forensic takedown of the "Bullseye Killer." We look at the moment detectives realized their prime suspect had appeared on a national game show just weeks before his final double murder. By freezing the archival footage and overlaying it with a 1989 police sketch, investigators found the "on the nose" proof that John Cooper was the man the world had been hunting. We also explore the groundbreaking DNA work that found a microscopic speck of a victim's blood in the hem of Cooper’s "scruffy" shorts. This is the definitive account of how modern technology and a lucky TV break finally brought justice to Pembrokeshire.
Subscribe to True Lives: bit.ly/3dBMxvl
This film was first broadcast: 2021
Check us out on Facebook: facebook.com/OurStoriesChannel
Watch More Documentaries
True Lives - bit.ly/3A8xRMJ
Up Close - youtube.com/@UpCloseITVS
Our History - bit.ly/3rUpdhL
Our World - bit.ly/3ftuckM
Our Stories - bit.ly/3ynfFyk
Taste - bit.ly/3OZoDcV
Blueprint - bit.ly/3ZK5UdD
True Lives brings you fascinating stories of social interest from around the world. You can discover award winning documentaries, films and groundbreaking reports that capture the complexities of our daily life, with stories that will entertain, inspire and inform.
Content distributed by ITV Studios.
For two decades, the Pembrokeshire Murders were the ultimate cold case. John Cooper had brutally executed four people on the Welsh coast, leaving the community in terror and the police with a trail that went dead in 1989. Cooper was a ghost—until he walked into a television studio.
This documentary investigates the incredible forensic takedown of the "Bullseye Killer." We look at the moment detectives realized their prime suspect had appeared on a national game show just weeks before his final double murder. By freezing the archival footage and overlaying it with a 1989 police sketch, investigators found the "on the nose" proof that John Cooper was the man the world had been hunting. We also explore the groundbreaking DNA work that found a microscopic speck of a victim's blood in the hem of Cooper’s "scruffy" shorts. This is the definitive account of how modern technology and a lucky TV break finally brought justice to Pembrokeshire.
Subscribe to True Lives: bit.ly/3dBMxvl
This film was first broadcast: 2021
Check us out on Facebook: facebook.com/OurStoriesChannel
Watch More Documentaries
True Lives - bit.ly/3A8xRMJ
Up Close - youtube.com/@UpCloseITVS
Our History - bit.ly/3rUpdhL
Our World - bit.ly/3ftuckM
Our Stories - bit.ly/3ynfFyk
Taste - bit.ly/3OZoDcV
Blueprint - bit.ly/3ZK5UdD
True Lives brings you fascinating stories of social interest from around the world. You can discover award winning documentaries, films and groundbreaking reports that capture the complexities of our daily life, with stories that will entertain, inspire and inform.
Content distributed by ITV Studios.
